RISC-V: KVM: Introduce KVM_EXIT_FAIL_ENTRY_NO_VSFILE

Currently, we return CSR_HSTATUS as hardware_entry_failure_reason when
kvm_riscv_aia_alloc_hgei failed in KVM_DEV_RISCV_AIA_MODE_HWACCEL
mode, which is vague so it is better to return a well defined value
KVM_EXIT_FAIL_ENTRY_NO_VSFILE provided via uapi/asm/kvm.h.

Signed-off-by: BillXiang <xiangwencheng@lanxincomputing.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20250923053851.32863-1-xiangwencheng@lanxincomputing.com
Signed-off-by: Anup Patel <anup@brainfault.org>

diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h
index 37213d86c0d1444b4014b7bc4df7dc8ef512926d..54f3ad7ed2e4bf2580c1659758bd9f89f7a451c8 100644 (file)
--- a/arch/riscv/include/uapi/asm/kvm.h
+++ b/arch/riscv/include/uapi/asm/kvm.h
@@ -23,6 +23,8 @@
 #define KVM_INTERRUPT_SET      -1U
 #define KVM_INTERRUPT_UNSET    -2U
 
+#define KVM_EXIT_FAIL_ENTRY_NO_VSFILE  (1ULL << 0)
+
 /* for KVM_GET_REGS and KVM_SET_REGS */
 struct kvm_regs {
 };

diff --git a/arch/riscv/kvm/aia_imsic.c b/arch/riscv/kvm/aia_imsic.c
index 11422cb95a64403cfa098c8e74d958a4d01df3f5..e597e86491c3b02532dc3247d2d247a12d17a47d 100644 (file)
--- a/arch/riscv/kvm/aia_imsic.c
+++ b/arch/riscv/kvm/aia_imsic.c
@@ -814,7 +814,7 @@ int kvm_riscv_vcpu_aia_imsic_update(struct kvm_vcpu *vcpu)
                /* For HW acceleration mode, we can't continue */
                if (kvm->arch.aia.mode == KVM_DEV_RISCV_AIA_MODE_HWACCEL) {
                        run->fail_entry.hardware_entry_failure_reason =
-                                                               CSR_HSTATUS;
+                                                               KVM_EXIT_FAIL_ENTRY_NO_VSFILE;
                        run->fail_entry.cpu = vcpu->cpu;
                        run->exit_reason = KVM_EXIT_FAIL_ENTRY;
                        return 0;